Electric sad-iron.



E. c. LOBTSOHER. ELECTRIC SAD IRON.

APPLICATION FILED AUG.31, 1911.

Patented Sept. 15,1914.

) UNITED. STATES PATENT OFFICE.

EMIL C. LOETSCI-IER, 0F DUBUQUE, IOWA.

ELECTRIC SAD-IRON.

Specification of Letters Patent.

Patented Sept. 15, 1914.

Application filed August, 31, 1911. Serial No. 647,119.

To all whom it mdy concern:

' 1 Be it known that I, EMIL C. LOETSCHER, a

' constructing an electric heating unit which will distribute the heatin the manner aforesaid and will be simple in construction, will notreadily burn out and can easily be replaced.

In what it consists, its mode of construction and its manner ofoperation and installation, will be fully set outin the followingspecification when considered in connection with the drawingsaccompanying the same and forming a part hereof. v

Figure 1 represents a longitudinal section through the sad-iron. Fig. 2shows a plan view of the-heating element as resting on the base of theiron. I Fig. 3 represents one of I the insulating plates placed aboveand below the unit. Fig. 4 is an insulating plate placed between theoverlapping parts of the heating element at the point. Fig. 5 shows aplan view of another mode of arranging the terminals, the mode ofattachment and construction.

"Referring to the drawings, 2 designates the base plate which is formedin the usual shape and providedwith an ironing or polishing bottomsurface. Upon the base is placed an insulating plate 4 preferably ofmica upon; which rests 'the heating element or member 5, and over themember 5 is another insulating plate 4 upon which is fas-f tened a coverplate 6 by screws 7 and 8 whichfixedly hold the insulating plates 4 andheating. member fi upon the base. Over all these parts and resting uponthe base is a hood 10 which is secured to the cover plate 6 by thescrews 12 and 14 which screws also serve to attach iron. I

The heating member 5 is made from a single straightstrip of resistancealloy ribbon,

the handle 15 to the sadstamped out to. form" slots or. notches 16 fromalternate sides whereby transverse ribbon-like portions are formedgiving a zigzag conducting ribbon formation, whereby the current willtravel in a zigzag path, and then, in order to make it conformsubstantially to theshape of the ironing surface of the sad ironand tobring the terminals 18 and 20 at the same end and further to increasethe resistance and heat at the point end 22 of the iron, the ribbon isfolded upon itself substantially at the center and within the length ofone of the transverse ribbonlike portions and into substantially V shapeleaving it doubled at the end 24 of the sadiron and the ends bent toconform to the curve of the edgesof the base and leavinga space betweenthe ends in the center of the base. I

By over-lapping the member at the center and by bringing the two ends orterminals near together the heating member'will be curved.edgewisecausing the slots 16 to open on the outside edge and theslots onthe inside to become narrower or close partially together. There is,inside, between the over.- lapping parts, an insulating plate 26,-shownin Fig. 4, which is provided with a notch 28 substantially of the widthof the folded ribbon-li'keportion, said plate adapted to engage the bolt8 and project between the slotsat the center of the ribbon when it isfolded. Care must be exercised in over-lapping the ribbon and .incurving-it lengthwise to prevent the same from buckling and topreventthe edges of the slots from contacting with each other on theinner edge of the ribbon.

In order to keep the edges of the slots well separated and the conductorribbon properly related to the polishing base, the terminals 18 and 20must be spaced quite a distance apart, andfor the purpose of bringingtheseterminals closer together whereby the introduction ofthecurrent ismore conveniently and better introduced, the last turn is folded uponitself and the terminals turned over bringing the two terminals closelytogether, as shown in Fig. 5.

In assembling the parts of" my devic whereby I accomplish thedesiredresults I place upon the base plate 2, a mica sheet 4 shown in Fig. 3.Upon this sheet 4 is laid the heating-member 5, which is in a straightstrip, and then fold it upon itself at the center and at the same timebring the terminals toward each :other which .will bend edgewise theribbon 5 till it will conform to Over the sad-iron thus constructed arese cured the hood 10 and the handle 15 by .the

provides -means for supplying bolts or screws 12 and 14. The terminals18 and 20 are attached to the terminal pins :13 v y hich pass throughthe hood l0 and are insulated therefrom. A suitable flexible cord thecurrent to theheating element.

It will be observed by this mode of constructing the heating member of asingle straight metal ribbon with the slots on alternate sides andfolding the middle upon itself and by curving the ends edgewise toconform with the curve of the ironing surface the heat will be greatlyincreased at -the point end and along the outer edges of the iron whereit is most needed and where the sad-iron cools first.

Having now described my invention what I claim and desire to secure byLetters Patent is v Y 1.' A resistance ribbon, provided with op-' tweenits' ends, for providing a substantiallytriangular member includingoverlapping portions of substantial length, the longitudi- 'nal portionsof the resistance ribbon which extend from the overlapping portionsbeing slightly longitudinally bent, and an insulating plate adapted tobepassed between the overlapping portions of the said strip and providedwith a longitudinally extending slot to receive the bent pQ rtion of thesaid stri QPA resistance ribbon'provided with oppositely extendingtransverse slots-forming oppositely'extending transverse strips, theresistance ribbon bein folded upon itself between its. ends by iendingone of the transverse strips thereof upon itself betw'een its ends forproviding a substantially triangular member including overlappingportions of substantiallength, and an insulating platearranged betweenthe overlapping portions near the bent portion of sald strip. i

In testimony-whereof, I afiix my signature in the presence of twowitnesses.

- EMIL G. LOETSOHER. Witnesses:

M. M. GADY, A. BfI-IANsrtAw.

ending one of the

